Limits, boundaries.

The range of a musical instrument refers to the span of pitches between the highest and lowest notes it can attain. It is an instrument’s upper and lower limits. 

Range is an Elemental card, and refers to limits in capacity, resources, or ability; its appearance indicates that we’ve bumped up against some sort of edge, some boundary. That boundary may be real, in which case we know what we have to work with; or it may be imagined or assumed, in which case it might be holding us back unnecessarily, or falsely coloring our view.